使用go get获取某些程序包时如何切换到golang.google.cn？

golang.org is blocked in China, but golang.google.cn is accessible. How can I switch into golang.google.cn when I use go get to fetch some package?

There are few options, one is to change git configuration:

git config --global url."https://golang.google.cn".insteadOf "https://golang.org"